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CN-122015991-A - Meter body gas rectifying structure and flowmeter

CN122015991ACN 122015991 ACN122015991 ACN 122015991ACN-122015991-A

Abstract

The invention discloses a meter body gas rectifying structure which comprises a rectifying cover and a measuring flow channel, wherein the rectifying cover is arranged on the periphery of the end part of the measuring flow channel, a third rectifying unit is detachably connected to one side, close to the rectifying cover, of the measuring flow channel, the first rectifying unit is provided with a first outer cylinder body which is in shape with a flowmeter and a plurality of groups of rectifying guide plates distributed on the inner periphery of the first outer cylinder body, each group of rectifying guide plates are obliquely arranged, and projection surfaces of two adjacent groups of rectifying guide plates are partially overlapped. The invention adopts the structure that the fairing is arranged in front of the measuring flow channel in the meter body, the medium flowing in from the front part is blocked, the flow path of the medium is changed, the medium can be dispersed on the periphery of the measuring flow channel along the periphery of the fairing, the medium can not directly enter the inlet of the measuring flow channel, the medium is wound on the inner side of the fairing in the meter body, and enters the measuring flow channel through the third rectifying unit along the gap/cavity formed between the fairing and the measuring flow channel.

Inventors

  • LEI LIANG
  • WEN ZHIHAO
  • LIU FEI

Assignees

  • 重庆信格诺仪表有限公司

Dates

Publication Date
20260512
Application Date
20260303

Claims (9)

  1. 1. A surface body gas rectifying structure, comprising: A fairing (43); a measuring flow path (41), wherein the fairing (43) is covered on the periphery of the end part of the measuring flow path (41); A third rectifying unit (3) detachably connected to one side of the measuring flow channel (41) close to the rectifying cover (43), A gap for a medium flow channel is reserved between the inner wall of the fairing (43) and the outer wall of the measuring flow channel (41) and the third fairing unit (3); the measuring device further comprises a first rectifying unit (1) positioned at the outer side of the fairing (43) and a second rectifying unit (2) matched with one side of the measuring flow channel (41) far away from the third rectifying unit (3); The measuring flow channel (41) comprises a flow channel body (410) with a rectangular section and an installation seat (411), wherein the installation seat (411) is detachably connected to the outer side of the flow channel body (410), and the installation seat (411) is provided with an installation hole (412) for assembling an ultrasonic transducer; The first rectifying unit (1) is provided with a first outer cylinder body (10) which is in shape with the flowmeter and a plurality of groups of rectifying guide plates (11) which are distributed on the inner periphery of the first outer cylinder body (10), each group of rectifying guide plates (11) are obliquely arranged, the projection surfaces of two adjacent groups of rectifying guide plates (11) are partially overlapped, and a rectifying cavity (12) for guiding a medium along the radial direction and the axial direction of the first outer cylinder body (10) is formed between the two adjacent groups of rectifying guide plates (11).
  2. 2. The structure of claim 1, wherein the mounting seats (411) are arranged in two pairs, and axes of the two pairs of mounting seats (411) are arranged in a crossing manner.
  3. 3. A surface gas rectifying structure according to claim 1 or 2, characterized in that an angle formed by an axis connecting line of said mounting base (411) on both sides and a center line of said flow channel body (410) is an acute angle.
  4. 4. The structure of claim 1, wherein the mounting bases (411) are arranged in pairs and symmetrically distributed with respect to the axis of the flow channel body (410), and the axes of the mounting bases (411) are located on the same straight line.
  5. 5. A surface gas rectifying structure according to claim 1, characterized in that said second rectifying unit (2) comprises a second outer cylinder (20), and a plurality of sets of split channels extending in a longitudinal direction and not communicating with each other uniformly distributed inside the second outer cylinder (20).
  6. 6. A flowmeter characterized by comprising the rectifying structure according to any one of claims 1 to 5, a meter body (4), and a corrector (5) rotatably connected to the meter body (4).
  7. 7. A surface gas rectifying structure according to claim 6, characterized in that said measuring flow path (41) is provided with at least one pair of ultrasonic packaging members (42).
  8. 8. A surface air rectifying structure according to claim 6, characterized in that a convex rib (22) or a groove which can be matched with the surface body (4) is arranged on the peripheral wall of the second outer cylinder body (20).
  9. 9. A surface gas rectifying structure according to claim 8, characterized by a mounting ring (23) at the end of said second outer cylinder (20).

Description

Meter body gas rectifying structure and flowmeter Technical Field The invention belongs to the technical field of fuel gas metering devices, and particularly relates to a meter body gas rectifying structure and a flowmeter. Background The ultrasonic flowmeter is a precise multichannel gas ultrasonic flowmeter, is specially designed for measurement application requiring high accuracy and reliability, is mainly used for trade metering of natural gas, and is used for serving urban fuel gas and industrial and commercial users. The upper part is connected with a corrector, integrates a temperature and pressure correction function, and can convert the working condition volume flow measured by the flowmeter into the standard condition volume flow, as shown in figure 1. The ultrasonic gas flow meters currently on the market are mostly transit time ultrasonic flow meters, where when ultrasonic waves propagate in a flowing medium, the ultrasonic wave velocity differs from the propagation velocity in a stationary medium with respect to a fixed coordinate system, the variation value of which is related to the medium flow velocity. Therefore, the flow velocity of the medium can be obtained according to the variation of the ultrasonic velocity, and the propagation time type ultrasonic flowmeter is designed according to the principle. The flow meter adopting the ultrasonic principle needs to ensure that the gas flow state medium entering the flow meter is in a uniform and stable state in the working state, but in the actual use process, the flow meter is influenced by the reasons of a pipeline elbow, a valve in a metering pipeline and the like, the inflow state and the distribution of the gas medium are adversely affected, the fluid medium is disturbed in a pipeline and a medium metering channel and flows irregularly, and the measurement precision of the gas medium is affected. The applicant has studied the problem of turbulence of a medium in a pipeline and a metering channel in the early stage and simultaneously applied for the Chinese patent with the application number of CN202422836412.0, and discloses a gas rectifier and a flowmeter, which can effectively improve the detection effect of an ultrasonic flowmeter on fluid after the gas rectifier rectifies the medium. However, under most conditions, because the field space is limited, it is often impossible to ensure that a straight pipe with a sufficient length is communicated with the flowmeter, for example, the number of the original rectifiers is simply increased, and the gas medium is scattered for multiple times, so that although the measurement influence caused by the installation condition of the short pipe can be slowed down to a certain extent, the flow path of the gas medium is still in a straight shape, the medium flow speed is higher, and the flow speed is directly in and directly out of the meter body, and the accuracy of the data measured by the flowmeter still needs to be further improved. Disclosure of Invention In order to solve the technical problems, the invention adopts the following technical scheme: a surface gas rectifying structure comprising: A fairing; A third rectifying unit detachably connected to one side of the measuring flow channel close to the fairing, The fairing is arranged on the periphery of the end part of the measuring flow channel, and a gap for a medium flow channel is reserved between the inner wall of the fairing and the outer walls of the measuring flow channel and the third fairing unit; the measuring flow channel is provided with a measuring flow channel, and the measuring flow channel is provided with a measuring flow channel and a third rectifying unit; The measuring flow channel comprises: a flow channel body; the mounting seat is detachably connected to the outer side of the runner body and provided with a mounting hole for assembling the ultrasonic transducer; the mounting seats are arranged in pairs and symmetrically distributed relative to the axis of the flow channel body, and the axes of the mounting seats are positioned on the same straight line. Further, the mounting seats are arranged in two pairs, and the axes of the two pairs of mounting seats are arranged in a crossing manner. Further, the angle formed by the connecting line of the axle center of the mounting seat and the central line of the runner body at two sides is an acute angle. Further, one side of the runner body, which is close to the second rectifying unit, is provided with a collecting hopper with an opening gradually shrinking inwards. The application also discloses a rectangular runner structure, which comprises the rectifying assembly, wherein the section of the runner body in the rectifying assembly is particularly rectangular, and the side part of the runner body is provided with a threaded hole matched with the mounting seat. Further, the mounting holes of the mounting seat are stepped holes. Compared with the prior art, the invention has the